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Convergence?? on Samsung SP-403JHA rptv

Discussion in 'Electronic Repair' started by [email protected], Jan 10, 2008.

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  1. Guest

    Hi all, Wondering if anyone can shed any light on my problem.
    My Samsung rear-projector TV has gone slightly out of sync, it's still
    watchable, but any text on screen is unreadable, it's not blurry as
    such, but looks as if part of it has shifted to the side.
    Basically it's ghosting.
    I've tried to dig up info on this, apparently it's down to
    convergence, and i've tried to find any service codes to put it right,
    but to no avail.
    the 'mute-1-8-2 or 3-p-on' doesn't do anything.
    Anyone have any ideas on what to do?
    If more info is needed, please feel free to ask, but bear in mind, i'm
    not completely tech savvy, but i'm not stupid either, if you
    understand what i mean.

    Cheers in advance.
  2. If this happened suddenly the last thing you should do is try to adjust
    it back to normal - whether it uses a service menu or manual controls.
    It sounds like a classic convergence problem. You or someone who knows
    how to service electronics must diagnose which components are bad. It's
    likely to be a few convergence amplifiers, and probably so low-ohm
    resistors. After the defective parts are replaced the set will likely
    need minor adjustments to the convergence.

    If you try major adjustments before properly servicing the TV, when the
    defective parts are replaced it will need major adjustments to put it
    right. This could cost you an hour or two more worth of labor added
    onto the repair costs.

    On the other hand if it happened VERY gradually and it is a CRT (Picture
    tube) based set then this is common as the tubes age and adjustments
    will likely make it watchable until the tubes totally wear out.
  3. Guest

    it has happened gradually, over the past year or so now.
    it's not a crt based one unfortunately,, it's lcd
    I had it adjusted about 18 months ago, as it went badly out when i
    moved, and that cost enough just to get an engineer out, and he used
    the standard remote to make adjustments, which cleared it up.
    I shuffled it around, and it went out again, the entire picture
    shifted about an inch and a half to the left, leaving part of the
    picture missing and a black line down one side.

    I sorted that myself, but cannot get the rest to align.
    Hence why looking for menu codes to re-align.
  4. Art

    Art Guest

    Convegence on an LCD set?? Been servicing many configurations of LCD sets
    and yet to see any with the generic convergence adjustments such as those
    found in crt based sets.
    However, have seen mis-aligned LCD panels causing a very similar looking
    display on a lot or LCD Procjectors. These normally are factory aligned but,
    with diligence and proper tools may be field serviced. Suggest finding a
    technician that is trained on your product and pay for the services.
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